Election analyst Mike Smithson also pointed out that the poll was conducted by the same company which, just three days earlier, said Theresa May had a 21% lead over Corbyn on who would make the best prime minister.

It's same YouGov that carried out today's selectorate poll that last week had LAB 11% behind CON and Corbyn 30% behind TMay as "best PM"

Speculation about YouGov’s impartial reporting of data was taken even further, when pro-Corbyn campaigner Aaron Bastani questioned why the pollster had taken time to extrapolate, condense and publish their survey’s results.

I'm told @YouGov completed 2 polls on Labour leadership election over last 10 days and released neither. Barely any journalists asking why.